package com.mm.android.deviceaddmodule.mobilecommon.widget.linechart.utils;
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import android.content.res.Resources;
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import android.graphics.Paint;
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import android.text.TextUtils;
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public class Utils {
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public static float dp2px(float dp) {
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return (int) (dp * Resources.getSystem().getDisplayMetrics().density + 0.5f);
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}
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public static int sp2px(float spValue)
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{
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final float fontScale = Resources.getSystem().getDisplayMetrics().scaledDensity;
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return (int) (spValue * fontScale + 0.5f);
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}
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public static float textWidth(Paint paint, String txt) {
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return paint.measureText(txt);
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}
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private static Paint.FontMetrics mFontMetrics = new Paint.FontMetrics();
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public static int textHeightAsc(Paint paint) {
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paint.getFontMetrics(mFontMetrics);
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return (int) (Math.abs(mFontMetrics.ascent));
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}
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public static int textHeight(Paint paint) {
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paint.getFontMetrics(mFontMetrics);
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return (int) (Math.abs(mFontMetrics.ascent) + Math.abs(mFontMetrics.descent));
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}
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/**
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* 将杂乱的数字变成里程碑。
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*
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* @param number
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* @return
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*/
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public static float roundNumber2One(double number) {
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if (Double.isInfinite(number) ||
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Double.isNaN(number) ||
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number == 0.0)
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return 0;
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final float d = (float) Math.ceil((float) Math.log10(number < 0 ? -number : number));//有几位？
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final int pw = 1 - (int) d;
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final float magnitude = (float) Math.pow(10, pw);
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final long shifted = Math.round(number * magnitude);
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return shifted / magnitude;
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}
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/**
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* 检测URL是否以http://或者https://开头，不是的话加上http://
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* <p>
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* </p>
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*
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*/
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public static String checkURL(String url) {
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if (TextUtils.isEmpty(url)) {
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return url;
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}
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if (!url.startsWith("http://") && !url.startsWith("https://")) {
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url = "http://" + url;
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}
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return url;
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}
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}
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